Multiport valve

ABSTRACT

A valve has a plurality of material inlet ports, a flushing inlet port, and an outlet port each connected to a respective supply of one of last two different liquid materials. A movable valve body in the valve has a passage and is shiftable between a plurality of positions in each of which a respective one of the inlet ports is connected to the outlet port via the passage. A controller moves the valve body between the positions such that, after each time the valve body is in a position connecting one of the material inlet ports to the outlet port and material has passed through the passage, the valve body is moved into a position connecting the passage with the flushing inlet port for flushing out the passage.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is related to copending U.S. patent application Ser.No. 16/923,419 filed 8 Jul. 2020 as a division of U.S. Ser. No.14/359,384 (now U.S. Pat. No. 10,780,470) itself filed 20 May 2014 asthe US stage of PCT/EP2012/001101 filed 20 Nov. 2012 with a claim to thepriority of DE 10 2011 119 021.3 filed 22 Nov. 2011.

FIELD OF THE INVENTION

The invention first relates to an multiport valve with a plurality ofinlet ports and an outlet port where the inlet ports are respectivelyconnectable to a material supply container and a valve body having athroughgoing passage displaceable relative to the inlet ports to connectone of the plurality of inlet ports and the outlet port. This passagecan also be brought into a communicative connection with a respectiveone of the various inlet ports to enable feeding of different materialssuccessively to the outlet port. Such an apparatus is known from theapplicant's subsequently published German patent application DE 10 2011108 396.

The above-described apparatus mentions the possibility of providing aflushing device in order to flush the valve out with a neutral fluid, inparticular with water. In this regard, it is proposed to provide waterinlet ports close to the inlet ports or in the region of thethroughgoing passage.

OBJECT OF THE INVENTION

The object of this invention is to provide an apparatus that can feeddifferent materials successively to the outlet port in an efficient andreliable manner.

The invention solves the problem in that at least one of the inlet portsis constituted as a flushing medium inlet port of a flushing device, andthe throughgoing passage can be brought into a communicative connectionwith the flushing medium inlet port as a result of a displacement of thevalve body for the purpose of flushing the passage.

The principle of the invention essentially consists in making availablean apparatus that comprises a plurality of inlet ports and at least oneoutlet port. Each of the inlet ports can be connected to a materialsupply container, for example with the aid of a line, e.g. a hose.Material supplies of different materials or media, i.e. differentfluids, are present in the containers. A number of material containerscorresponding to the number of inlet ports or a smaller number ofcontainers can be provided.

According to the intended purpose and application of the apparatus, theoutlet port of the apparatus can be connected by a line, e.g. a hoseline, to a user. The user can for example be a washing machine, inparticular a textile-washing machine, e.g. an industrial washing machineor a household washing machine or a rinsing machine, e.g. a dish-washingmachine or a bottle-washing machine or a container-washing machine.Depending on the intended purpose of the apparatus, for example in foodprocessing or production, the user can however also be of a completelydifferent type, for example provided by a pizza oven or, in the case ofapplications in the chemical industry, a mixing container, a boiler orsuchlike. The outlet port of the apparatus can also be constituted andpositioned such that various essential oils are fed through it to a flowof steam for the operation of a sauna.

The apparatus further comprises a valve body displaceable relative tothe inlet ports. It can be a rotationally displaceable valve body, forexample in the form of a disk, preferably made of ceramic, oralternatively a linearly displaceable valve body. The valve bodycomprises a passage that can be brought into a communicative connectionoptionally with a respective one of the various inlet ports.

A slip agent, e.g. a penetrating oil or a grease, can be used on theinlet port side of the displaceable valve body, the inlet port sideproviding the sealing function. This also applies in the case where thevalve body is made of ceramic material.

At least one pump is preferably disposed downstream of the passage.

If the passage is in a communicative connection with an inlet port, asubatmospheric pressure can be generated in the passage by operation ofthe pump and the corresponding material can be carried out through therespective inlet port, carried into the passage and transported to theoutlet port.

Different materials or media, e.g. different fluids, can preferably bepresent in the containers, which materials or media must not or shouldnot enter into contact with one another and which should be accommodatedseparate from one another, e.g. because they are aggressive, orexplosive, or reactive.

In order to transport these different materials in the desired quantityand at the desired time to the user, and to prevent residues in thepassage or in the region of the line between the outlet port and theuser from becoming undesirably mixed together or from reacting with oneanother, a flushing device is provided according to the invention.Assigned to this flushing device is a flushing medium inlet port,through which flushing medium can be carried into the apparatus. Atleast one of the inlet ports of the apparatus is constituted as aflushing medium inlet port. As a result of a displacement of the valvebody, the passage can be aligned not only with the material inlet ports,but also with at least one flushing medium inlet port, preferably one ofa plurality of flushing medium inlet ports. Once the passage has alignedwith a flushing medium inlet port, the passage is in a communicativeconnection with the flushing medium inlet port and can be flushed.Simultaneously with the flushing of the passage, flushing of the outletport can also take place, as well as flushing of the line locateddownstream of the outlet port or a section of this line and/or forexample a pump disposed downstream of the outlet port.

Flushing can take place with a suitable flushing medium, e.g. with freshwater or process water, or with another medium, this depending on theintended application of the apparatus.

By constituting at least one of the inlet ports as a flushing mediuminlet port of a flushing device, a feed-in of a flushing medium upstreamof the passage can be achieved in a particularly favorable manner. Inorder to carry out the feed-in of a flushing medium, it is sufficient todisplace the valve body and to assume a position in which the passage isin a communicative connection with a flushing medium inlet port.

The contents of the above-described post-published patent application DE10 2011 108 396 A1 are thus included in the contents of the presentpatent application, also for the purpose of reference to individualfeatures.

Provision can advantageously be made such that a flushing medium inletport is disposed between two respective material inlet ports. Each timewhen a fluid, i.e. a chemical for example, has been carried into thepassage, and the valve body is then moved in order to align with anotherinlet port so as to perform a further material input, a flushing mediuminlet port can be crossed by the passage, so that for example a flushingprocedure necessarily takes place before a further material input takesplace, or alternatively there is at least a possibility of carrying outa flushing procedure. Under certain circumstances, it may also bedesirable, for example when a particular washing program is beingcarried out, for two different materials to be mixed already in thepassage or at any rate at an early stage, without a flushing procedurebeing required or desired.

Alternatively, provision can be made such that a flushing medium inletport is disposed between two respective pairs of material inlet ports. Aflushing medium inlet port can thus be accessed by a valve bodydisplacement through a very small angle of rotation.

Moreover, the embodiment according to the invention of at least one ofthe inlet ports as a flushing medium inlet port brings particularadvantages with regard to guaranteeing tightness. For the sealing of theflushing medium inlet port or, in the case of a plurality of flushingmedium inlet ports, the sealing of this plurality of sealing mediuminlet ports with respect to the exterior, use can be made of the samesealing surface of the valve body that—depending on the displacementposition of the valve body—also serves to seal the material inlet portswith respect to the exterior. An overall high degree of tightness of theapparatus can thus be achieved with at the same time a simple design ofthe apparatus.

According to an advantageous embodiment of the invention, the flushingdevice comprises a flushing medium distributor passage. The latter canconnect a common flushing medium supply to a plurality of flushingmedium inlet ports or flushing medium inlet ports. For example, there isthe possibility of constituting the apparatus by two ceramic disks ordisks made of another material rotatable relative to one another. Aninlet port disk comprises on its inlet port side a series of materialinlet ports and a common flushing medium inlet port. The outlet portside of the inlet port disk comprises a number of openings correspondingto the material inlet ports, and an arrangement of a half-open groovewith a plurality of groove extensions disposed star-shaped. This grooveis constituted overall as a flushing medium groove. Each of the grooveextensions extends between two material inlet ports. Each flushingmedium inlet port is thus disposed between two material inlet ports.

According to a further aspect, the invention relates to a method for theswitchable connection of an inlet port to an outlet port.

The problem underlying invention is to provide a method with whichdifferent materials can be fed successively to an outlet port in aparticularly straightforward and reliable manner.

The invention solves this problem.

According to a first process step, and the valve body, i.e. for examplea ceramic disk of an apparatus, is displaced. A displacement of thevalve body into a first position takes place. In this position, apassage that is a component part of the valve body, i.e. a componentpart of the outlet port disk for example, can be brought intocommunicative connection with a first inlet port. The first inlet portis connected to a supply container of a first material or medium.

A pump is operated according to a further step. The pump is disposed inparticular downstream of the outlet port. It can for example be a hosepump.

By operating the pump, material, the so-called first material, iscarried out of the inlet port into the passage and, if appropriate,depending on the size of the volume, also into line sections that aredisposed downstream of the passage. An input into the passage takesplace according to a predetermined duration or—taking account of thepump capacity—until a predetermined input volume is reached.

According to a further process step, the valve body is then displacedinto a changed, second position. In this second position, the passage isno longer in a communicative connection with the first inlet port. Inparticular, in this second position of the valve body, the first inletport is sealed off with respect to the exterior. The valve body locatedin the second position can also advantageously provide a communicativeconnection of the passage with a flushing medium inlet port.

According to a further process step, flushing medium is introduced intothe passage when the passage is located in the second position of thevalve body. This introduction takes place in order to flush the passage.

Furthermore, the method can be carried out in such a way that each time,after a displacement of the valve body into a position in order tointroduce material from a material inlet port into the passage, afurther displacement takes place in order to carry out a flushingprocedure. The method is also operated advantageously in such a way thata flushing medium input takes place each time after a material inputinto the passage.

A displacement of the valve body advantageously takes place regularly,i.e. at least once within a predetermined period, of for example 24hours. A movement of the valve body takes place, insofar as is it is formaintenance purposes, even when the apparatus is not in operation. Bymeans of such a regular displacement of the valve body with respect tothe inlet port disk, it is possible to prevent the decisive sealingsurfaces from becoming ineffective, or the for example ceramic surfacesfrom adhering to one another and for example from undergoing coldwelding.

The problem underlying the invention is to provide an apparatus that canfeed different materials successively to the outlet port in an efficientand reliable manner.

The invention solves this problem in that, for the flushing of thepassage, a flushing device is provided that is connected to a water mainwith the interposition of a pipe disconnecting device.

With regard to the definition of the terms used, reference will be madeto the above statements to avoid repetition.

The flushing device preferably comprises a container, in which water iscontained as a flushing medium. The water container is connected to theflushing medium inlet port by a hose line or another suitable line. Thepipe disconnecting device comprises a connection to a water main. Thisconnection comprises for example a valve that is switchable, i.e.openable and closable, from a control. Moreover, the control isconnected to two level sensors that for example can ascertain an upperand a lower level in the water container. As soon as the lower level isreached or fallen below due to removal of water from the container, thecontrol is able to ascertain this, and the valve to the water main canrespond in the sense of opening. The water flowing through the openedvalve can fall through a drop section and fill the container until theupper level is reached. This is ascertained by the control, with theresult that the valve is closed.

In an alternative embodiment of the invention, the pipe disconnectingdevice comprises only one level sensor. Here, for example when apredetermined level is reached or fallen below and there is acorresponding detection by the single level sensor, it is possible bymeans of the control to cause the valve to open for a specific period sothat a previously determined volume can then be filled into the watercontainer.

The water present in the flushing medium container is not therefore in adirect communicative connection with the water main, but is separatedfrom the latter by a drop section. This thus prevents impurities,chemicals, germs or suchlike from being able to get into the drinkingwater network through a backflow.

Finally, in an alternative embodiment of the invention, a functionalregion of the apparatus itself is also able to act as a pipedisconnecting device. For this purpose, the apparatus is preferablyconstituted such that it provides different flow paths, it being ensuredthat the two flow paths cannot enter into a communicative connectionwith one another. For example, there can be assigned to the apparatus asecond outlet port that is connected to the flushing medium container,the flushing medium container being in a communicative connection withthe flushing medium inlet port. The at least two different flow pathsthrough the apparatus, which are permanently strictly separated from oneanother, can be obtained for example by a rotational angle limitation ofthe valve body of for example 180°.

The problem underlying invention is to provide an apparatus that canfeed different materials successively to the outlet port in an efficientand reliable manner.

The invention solves this problem in that a device for the through-flowmeasurement is disposed downstream of the outlet port.

The distinctive feature consists in the fact that a device for thethrough-flow measurement is disposed downstream of the outlet port. Itcan be a device that measures or monitors the through-flow volume, i.e.the through-flow quantity. Alternatively, a time measurement can alsotake place that is sufficient in particular to determine the volume thathas flowed through if the through-flow streams are known. The latteralso depend, in particular, on the pump capacity, possibly also on otherparameters. The device for the through-flow measurement is disposeddownstream of the outlet port, in particular close to the pump. The pumpcan be any suitable pump, e.g. a hose pump.

In particular, the device for the through-flow measurement can also beconnected to a computer that generates logs or documentation or to whichrecourse can be taken to generate logs or documentation. The generateddocumentation can be used to ascertain or to demonstrate what materials,e.g. what chemicals, have been used at what times and in whatquantities. The acquisition of evidence of use is thus possible.

The problem underlying the invention is to provide an apparatus that canfeed different materials successively to the outlet port in an efficientand reliable manner.

The invention solves this problem in that a device detecting theposition of the valve body is provided.

An essential distinctive feature consists in the fact that a device isprovided for detecting the position of the valve body. This deviceserves to provide a control with the possibility of acquiringinformation about the position in which the valve body is located at aspecific time and/or about the measures that the control must take inorder to approach a specific material inlet port or a specific flushingmedium inlet port as a result of a displacement of the valve body.

A constant or permanent detection of the position of the valve body ispreferably carried out. In an alternative embodiment, the detection ofthe position of the valve body can also take place periodically, i.e.regularly, or at previously determined suitable times.

The device for detecting the position of the valve body can for examplecomprise a measuring device that directly ascertains the position of thevalve body in an optical, inductive, capacitive, electrical, magnetic orother physical manner. For this purpose, markings, e.g. optical,magnetic, electrical or other markings, can for example be provided onthe valve body or be connected to the valve body.

In this connection, there is in principle also the possibility ofcarrying out a control of the valve body with the aid of a so-calledreferenced stepping motor, i.e. a special stepping motor that has areference position and that can be addressed in such a way that thecontrol knows the position in which the valve body driven by thestepping motor is located, or, more precisely, the position in which thepassage is located.

It should be pointed out that the device for detecting the position ofthe valve body can also be provided with a counting apparatus, in orderfor example to measure or to count rotational angle ranges through whichthe valve body is displaced starting from a differential position.

In this connection, it should be pointed out that the possibility existsin theory of providing the valve body with more than one passage.

The problem underlying invention is to provide an apparatus that canfeed different materials successively to the outlet port in an efficientand reliable manner.

The invention solves this problem in that a gear-tooth system, such astoothed wheel or a toothed rod, is assigned to the valve body, thegear-tooth system cooperating with a toothed wheel that can be operatedby a drive for the purpose of displacing the valve body.

A further aspect of the invention consists in the fact that a gear-toothsystem is assigned to the valve body. The gear-tooth system can beworked directly into the valve body. A gear-tooth system, e.g. also madeof a material other than the material from which the valve body is made,can alternatively be affixed to the valve body. For example, in the caseof an essentially disc-shaped valve body made for example of ceramic,the gear-tooth system can be constituted by plastic or metal, inparticular by a rim of a toothed wheel that surrounds the valve bodyouter peripheral surface.

If the valve body is constituted rotationally displaceable, it isadvisable to provide the gear-tooth system with a toothed wheel rim. Inthe case where the valve body is constituted linearly displaceable, itis advisable to provide the valve body with a toothed rod.

The drive for the displacement of the valve body can preferablycooperate with a toothed wheel, i.e. can operate such a toothed wheel inthe sense of a rotary motion. The toothed wheel can cooperate with thegear-tooth system and in this way displace the valve body.

The problem underlying the invention is to provide an apparatus that canfeed material successively to the outlet ports in an efficient andreliable manner.

An essential aspect of the invention consists in the fact that anapparatus according to the prior art is used in a geometrically invertedarrangement. The outlet port of the previously described apparatus nowacts as an inlet port and the plurality of inlet ports of the previouslyknown apparatus now act as a plurality of outlet ports and, as for therest, the structural design of the apparatus is unchanged. Inparticular, a valve body can be displaced, in the manner previouslydescribed and also described in detail in the examples of embodiment, inorder to connect the inlet port in a communicative manner to arespective one of the outlet ports.

According to a further aspect of the invention, an apparatus accordingto the prior art is linked in a series connection to a further apparatusaccording to the prior art in such a way that the outlet port of a firstapparatus is coupled with an inlet port of the second apparatus. Furtherapparatuses can also be connected in series. An arbitrary large numberof different material supply containers can thus be connected to theapparatus and a correspondingly selectable total number of differentmedia mixable with one another or feedable successively to a targetcontainer can be obtained.

The problem underlying the invention is to provide an apparatus that canfeed different materials successively to the outlet port in an efficientand reliable manner.

The arrangement of an device for measuring the conductivity downstreamof the outlet port offers the possibility of reliably monitoring themedium fed to the user or the users, at least insofar as a measurementof the conductivity permits a conclusion to be drawn as to theparticular nature or property of the fed medium.

Further advantages of the invention emerge from the uncited sub-claims,as well as from the following description of the examples of embodimentof the invention represented in the drawings. In the drawings:

FIG. 1 shows, in a diagrammatic, partial cross-sectional view, a firstexample of embodiment of a valve body of an apparatus according to theinvention,

FIG. 2 shows a rear view, i.e. a view of the outlet port side, of thevalve body of FIG. 1 according to viewing arrow II in FIG. 1 ,

FIG. 3 shows a front view of the valve body of FIG. 1 according toviewing arrow III in FIG. 1 ,

FIG. 4 shows a perspective view of the valve body roughly according toviewing arrow IV in FIG. 1 ,

FIG. 5 shows a side view of the inlet port disk of an example ofembodiment of the apparatus according to the invention,

FIG. 6 shows a front view of the inlet port disk, i.e. a view of theinlet port side of the inlet port disk according to viewing arrow VI inFIG. 5 ,

FIG. 7 shows a partial cross-sectional view through the inlet port diskroughly along cross-sectional line VII-VII in FIG. 6 ,

FIG. 8 shows a view of the outlet port side of the inlet port diskaccording to viewing arrow VIII in FIG. 7 ,

FIG. 9 shows a partial cross-sectional view through the inlet port diskof FIG. 8 according to cross-sectional line IX-IX in FIG. 8 ,

FIG. 10 shows a perspective view through the inlet port disk accordingto viewing arrow X in FIG. 7 ,

FIG. 11 shows, in a diagrammatic representation, an example ofembodiment of an apparatus according to the invention in the assembledstate with the inlet port disk, valve body and housing,

FIG. 12 shows a diagrammatic view of the assembled apparatus roughlyalong viewing arrow XII in FIG. 11 ,

FIG. 13 shows an assembled apparatus in a diagrammatic representationroughly according to cross-sectional line XIII-XIII in FIG. 12 ,

FIG. 14 shows a perspective view of the apparatus roughly according toviewing arrow XIV in FIG. 11 ,

FIG. 15 shows a perspective rear view roughly according to viewing arrowXV in FIG. 11 ,

FIG. 16 shows a further example of embodiment of an apparatus accordingto the invention in a diagrammatic representation in the manner of ablock diagram, with a user constituted as a washing machine and aplurality of indicated material supply containers and a flushing mediumcontainer,

FIG. 17 shows, in a diagrammatic representation, an example ofembodiment of a pipe disconnecting device disposed upstream of theapparatus according to the invention, as well as the flushing mediumcontainer of FIG. 16 ,

FIG. 18 shows a further example of embodiment of an apparatus accordingto the invention in a representation similar to FIG. 13 , wherein thedrive and a driving toothed wheel and further details of the elementsexplained in the description of the FIGS. are also represented,

FIG. 19 shows a further example of embodiment of an apparatus accordingto the invention in a representation according to FIG. 18 , wherein amodified position marking element and a modified device for the positiondetection of the valve body is provided here,

FIG. 20 shows a magnified detail representation of the position markingelement used in this example of embodiment, roughly along viewing lineXX in FIG. 19 ,

FIG. 21 shows a further example of embodiment of an apparatus accordingto the invention, wherein the apparatus is used geometrically inverted,

FIG. 22 shows a further example of embodiment of an apparatus accordingto the invention, wherein a row or series connection has been made insuch a way that two apparatuses according to the invention are disposedwith their outlet ports facing one another, in order to achieve aplurality of switchable communication paths,

FIG. 23 shows a further example of embodiment of an inlet port disk ofan alternative example of embodiment of an apparatus according to theinvention in a perspective front view, similar to the representation ofFIG. 6 ,

FIG. 24 shows a perspective rear view of the inlet port disk of FIG. 23,

FIG. 25 shows a further example of embodiment of a valve body of analternative embodiment of an apparatus according to the invention in afront view, in a representation similar to FIG. 3 ,

FIG. 26 shows a perspective rear view of the valve body of FIG. 25 ,

FIG. 27 shows a further example of embodiment of an apparatus accordingto the invention in the assembled state using the inlet port disk ofFIG. 23 and the valve body of FIG. 25 in a perspective view,

FIG. 28 shows the assembled apparatus of FIG. 27 in a front view,according to viewing arrow XXVIII in FIG. 27 ,

FIG. 29 shows a further example of embodiment of an inlet port disk ofan apparatus according to the invention in a representation similar toFIG. 24 ,

FIG. 30 shows a further example of embodiment of an apparatus accordingto the invention in a representation according to FIG. 28 using an inletport disk of FIG. 29 ,

FIG. 31 shows a further example of embodiment of a valve body for afurther example of embodiment of an apparatus according to the inventionin a representation according to FIG. 26 in a rear view,

FIG. 32 shows the valve body of FIG. 31 in a front view in arepresentation similar to the representation of FIG. 25 ,

FIG. 33 shows a further example of embodiment of an inlet port disk foran apparatus according to the invention in a front view, similar to arepresentation according to FIG. 24 ,

FIG. 34 shows the inlet port disk of FIG. 33 in a rear view,

FIG. 35 shows a further example of embodiment of an apparatus accordingto the invention in the assembled state in a diagrammaticcross-sectional view in a representation comparable to therepresentation of FIG. 13 , and

FIG. 36 shows the apparatus of FIG. 35 in a perspective front view.

A plurality of examples of embodiment of the apparatus according to theinvention are described below making reference to the drawings. For thesake of clarity, it is pointed out that parts or elements of theapparatus that are the same or comparable with one another are denoted,including where different examples of embodiment are concerned, by thesame reference numbers, in some cases with the addition of smallletters.

Each of the described examples of embodiment can be read—insofar as notechnical contradictions arise—as an example of embodiment of each ofthe inventions described in the plurality of independent claims.

It should also be noted that technical features or elements or partsthat are described in the following FIGS. only in respect of one or anumber of examples of embodiment can, insofar as no technicalcontradictions exist, also be provided within the scope of the inventionin the other examples of embodiment.

The apparatus according to the invention—including where differentexamples of embodiment are concerned—is denoted overall by 10. It isrepresented in a diagrammatic cross-sectional representation in FIG. 11and comprises two essential central elements in the form of an inletport disk 11 and a valve body 12.

The apparatus has a compact design and is, as indicated in FIG. 16 ,connected to a plurality of material supply containers 13 a, 13 b, 13 c,13 d, 13 e, 13 f via lines 14 a, 14 b, 14 c, 14 d, 14 e, 14 f. Aflushing medium container 15 and a line 16 connecting the latter is alsoworthy of mention.

Different materials or media 17 a, 17 b, 17 c, 17 d, 17 e, 17 f areaccommodated in the different containers 13 a, 13 b, 13 c, 13 d, 13 e,13 f. It involves fluids that can be transported through the lines withthe aid of pumps.

The different materials 17 a, 17 b, 17 c, 17 d, 17 e, 17 f can forexample be different detergent components, different concentrates,washing agent active ingredients, different enzymes, differentsurface-active agents, different mixtures of surface-active agents,different liquids etc. The above-described list of different materialsrelates to the case where user 18, i.e. the apparatus that is connectedto an outlet port 19 of apparatus 10, is a washing machine indicated inFIG. 16 , for example a household washing machine or an industrialwashing machine.

In other areas of application, for example in the food industry, inwhich apparatus 10 is used for example to mix different food additives,other materials are of interest and are accommodated in containers 13 a,13 b, 13 c, 13 d, 13 e, 13 f.

Apparatus 10 essentially serves to feed the different materials 17 a, 17b, 17 c, 17 d, 17 e, 17 f in a metered manner at desired times to acommon outlet port 19. Before a supply takes place to outlet port 19,the materials should be accommodated separate from one another, so thatthey cannot mix with one another or react with one another. One alsospeaks of phase separation. In particular, this is understandable whenconsideration is given to the fact that different chemicals that exhibitchemical agressivity or reactivity may not be brought into contact withone another or may not be fed to washing machine 18 or another useruntil a specific predetermined time.

With reference to FIG. 16 , it should be noted that the flow directionof the fluid stream through apparatus 10 is denoted overall by arrow P.

Provided downstream of outlet port 19 is a pump 20 that can be madeavailable for example by a hose pump. Provided downstream or upstream ofpump 20, but downstream of outlet port 19 according to FIG. 16 , is anapparatus 21 for the through-flow measurement. Apparatus 21 can beconnected via a signal line and/or control line 64 a to a computer unit22 (only indicated) that for example keeps a log of the through-flowquantities.

Pump 20 can also be connected to computer unit 22 via a signal lineand/or control line 64 c.

Apparatus 10 advantageously comprises a control 23 that is connected toapparatus 10, as merely indicated in FIG. 16 , via a further signaland/or control line 64 b.

Control 23 can for example activate a drive 62 of apparatus 10, thedrive not being represented in FIG. 16 but indicated in FIG. 18 .Furthermore, control 23 can be connected to user 18, for example to acontrol disposed in user 18 via a further signal and/or control line 64e. Control 23 can also be a component part of user 18.

Apparatus 10 can also be a component part of user 18, or can be disposedin or on it. Finally, control 23 can also be connected to computer unit22 via a further signal and/or control line 64 d. As the block diagramin FIG. 16 already makes clear, computer units 22 and control 23 can bemade available by different modular units, but alternatively also by acommon modular unit.

Provision can be made in examples of embodiment of the invention suchthat an apparatus 73 for measuring the conductivity is provideddownstream of outlet port 19, as indicated in FIG. 16 . The latter canbe provided alternatively or in addition to apparatus 21 for thethrough-flow measurement, also represented, and can also be connectedvia an indicated signal and/or control line to computer unit 22.

The conductivity of the medium can be exactly determined with the aid ofapparatus 73 for the conductivity measurement.

With an embodiment of the invention described subsequently in connectionwith FIG. 21 , an device for the conductivity measurement (notrepresented there) can also be disposed downstream of inlet port 27 x.

In the example of embodiment according to FIG. 16 , the arrangement ofapparatus 73 for the conductivity measurement is advantageous, forexample, if solutions with different saline concentrations, or differentsaline solutions, are provided as different media. By the measurement ofthe conductivity, particular reliability can for example be guaranteed,or it can be established with a high degree of precision, and if need belogged, what saline solution has been used and at what time.

Apparatus 10 advantageously comprises, as indicated in FIG. 11 , ahousing 24. Valve body 12 and inlet port disk 11 are accommodated in thehousing.

Inlet port disk 11 is described with the aid of FIGS. 5 to 10 :

Inlet port disk 11 is essentially disc-shaped, i.e. it is an essentiallycircular element when viewed, outer diameter D whereof is greater thanwall thickness W. Inlet port disk 11 comprises an inlet port side 25 andan outlet port side 26. Six inlet ports 27 a, 27 b, 27 c, 27 d, 27 e, 27f are located on inlet port side 25. The number of inlet portscorresponds to the maximum number of material containers 13 a, 13 b, 13c, 13 d, 13 e, 13 f that can be connected to apparatus 10. The number ofsix inlet ports represented in the described examples of embodiment isto be understood merely by way of example and is arbitrary.

Furthermore, an inlet port 28 for a flushing medium is provided on inletport side 25 of inlet port disk 11. Disk 11 is provided in the centerwith a through-hole 29.

Through-hole 29, and likewise through-hole 29 of valve body disk 12 tobe described below, can be penetrated by a centering element or a shaftor possibly a drive shaft, in particular can also be penetrated jointly.This will be explained further below with the aid of FIGS. 27 and 28 .

As is made clear for example by the cross-sectional representation ofFIG. 9 , each inlet port 27 a, 27 b, 27 c, 27 d, 27 e, 27 f isconstituted as a blind hole and comprises a narrower throughgoingpassage region 30 and, compared with that, a somewhat wider neck region31. A respective connecting piece 32 can be inserted into each neckregion 31 (see FIG. 11 ), outer end 33 whereof can be connected forexample to a hose. A particularly simple means of connection is thusprovided.

Inlet port disk 11 comprises on its outlet port side 26 a number ofinlet ports 34 a, 34 b, 34 c, 34 d, 34 e, 34 f corresponding to thenumber of inlet ports 27 a, 27 b, 27 c, 27 d, 27 e, 27 f. Furthermore,an opening 35 (FIG. 8 ) is provided that communicates with flushingmedium inlet port 28. Opening 35 emerges into a groove arrangement 36(see FIG. 8 and FIG. 10 ) that comprises an essentially annular innerregion 37 and groove-pocket ends 38 a, 38 b, 38 c, 38 d, 38 e, 38 fdisposed star-shaped. The arrangement is made in such a way that agroove-pocket 38 a is disposed as a flushing medium inlet port betweentwo respective inlet ports 34 a, 34 b that communicate with inlet ports27 a, 27 b.

Valve body 12 is described with the aid of FIGS. 1-4 .

The valve body is an essentially disc-shaped body with an inlet portside 39 and an outlet port side 40. Disposed on outlet port side 40 ofvalve body 12 is outlet port 19 that, like inlet ports 27 a, 27 b, 27 c,27 d, 27 e, 27 f, 28, comprises a widened neck region 31 and a narrowerpassage region 30, in particular in order to fit a hose with the aid ofa connecting piece. Actual passage 42 is provided by narrow region 30 ofoutlet port 19.

Inlet port side 39 of, valve body 12 is constituted completely smoothexcept for central through-hole 29 and mouth region 41 of passage 42.

In the assembled arrangement, inlet port disk 11 and valve body 12 arefitted in a concentric arrangement with respect to one another, in sucha way that they are orientated along a common central axis M. Centralaxis M at the same time represents the geometrical rotational axisaround which valve body 12 can be rotated relative to fixedly held inletport disk 11.

With its outlet port side 26, inlet port disk 11 faces inlet port side39 of valve body 12, wherein tightness with respect to the exterior isachieved between the two elements 11, 12 on account of the materialsused and the exerted pressing forces. Depending on the rotationalposition of valve body 12, passage 42 can be brought with its mouthregion 41 either into contact with a blocking region 43 of inlet portdisk 11, or with an inlet port 34 a, 34 b, 34 c, 34 d, 34 e, 34 f orwith a region 38 of groove 36.

If mouth region 41 of passage 42 lies opposite a blocking region 43,outlet port 19 is sealed off with respect to any of inlet ports 28, 27a, 27 b, 27 c, 27 d, 27 e, 27 f etc., i.e. the apparatus blocks anyfluid flow from supply containers 13 a, 13 b, 13 c, 13 d, 13 e, 13 ftoward user 18 and closes containers 13 a, 13 b, 13 c, 13 d, 13 e, 13 fat the same time with respect to the exterior. Smooth region 65 (FIG. 3) of inlet port side 39 of valve body 12 at the same time ensures,through a corresponding cooperation with inlet ports 34 a, 34 b, 34 c,34 d, 34 e, 34 f and with groove 36, complete sealing of all the inletports with respect to the exterior.

Only when passage 42 is moved, as a result of a rotation of valve body12, into a position in which its mouth region 41 lies opposite an inletport 34 and is in a communicative connection with associated inlet port27 can a fluid flow be brought about through passage 42 by thegeneration of a subatmospheric pressure by pump 20 in passage 42.

When throughgoing passage 42 is to be displaced out of a first position,in which it lies for example opposite opening 34 a, into anotherposition in which it lies for example opposite opening 34 b, itnecessarily crosses groove-pocket 38 a that represents a flushing mediuminlet port. If passage 42 remains for a previously determined time in aposition in which it lies opposite groove-pocket 38 a, the pump candeliver a previously determined volume of flushing medium throughpassage 42 and in this way clean passage 42 free from residue.

A particular role is played here by the fact that passage 42 itself isconstituted linear and has no unevennesses on its side walls. As aresult, particularly advantageous flow conditions can be achieved thaton the one hand permit a precise prior determination of the fluid flowthrough passage 42 required for cleaning, and on the other hand enableparticularly advantageous complete flushing of passage 42.

FIG. 12 shows that valve body 12 is surrounded by a gear-tooth system44. Gear-tooth system 44 can be a component part of a metallic or inparticular a plastic annular body 59 that is fixed to valve body 12.

The cross-sectional representations of FIGS. 11, 18 and 13 show thatannular body 59 can be placed on outlet port side 40 of valve body 12and can partially engage over valve body 12 on the inside and outside.For this purpose, annular body 59 can be provided with a centralextension 66 that engages in corresponding through-hole 29 of valve body12. At the same time, material regions 67 of annular body 59 (FIG. 13 )can be constituted such that valve body 12 is slightly overlapped on itsouter lateral surface. The entire annular body 59 can be constituted bymetal. It also comprises a through-hole 68 in an aligned arrangementwith passage 42, as is shown in FIG. 11 .

Alternative options are of course available to the person skilled in theart for providing a gear-tooth system 44 on valve body 12. For example,such a gear-tooth system can also be worked directly into the materialof valve body 12.

Valve body 12, as also inlet port disk 11, is preferably made of aceramic material. Surfaces 39, 26 lying opposite one another canadvantageously be lapped.

The toothed wheel providing gear-tooth system 44 is connectednon-rotatably to valve body 12.

FIG. 18 shows that, apart from inlet port disk 11, valve body 12 andtoothed-wheel annular body 59, a drive 62, e.g. an electric motor, isalso disposed inside housing 24. Drive 62 can cooperate via a spindlearrangement 61 with a driving toothed wheel 60. The teeth of thistoothed wheel 60 mesh with gear-tooth system 44 of annular body 59 and,to this extent, can set valve body 12 into rotation and displace passage42.

In order to activate drive 62, a control 63 is provided that isconnected to the drive via a signal and/or control line 64 f. Control 63in the example of embodiment of FIG. 18 can be provided in addition to acontrol 23 according to the example of embodiment of FIG. 16 . The twocontrols 23, 63 can however also be provided by a common component.

In FIGS. 11, 12 and 18 , a position marking element 45 is indicated thatis disposed only at a specific circumferential point of valve body 12 oris assigned to such a point. The rotational position of valve body 12can be detected with the aid of position marking element 45, theposition whereof is detected.

A position detection unit 69 is provided for this purpose that can bedisposed for example in the region of housing 24 of apparatus 10.Position detection apparatus 69 can be made available by a sensor or adetector that can detect the presence of marking element 45, for examplein its immediate vicinity. It can for example be a proximity sensoror—depending on the design and embodiment of marking element 45—anoptical, electrical, inductive, capacitive, magnetic, acoustic orotherwise suitably constituted sensor.

Position detection unit 69 is connected via a signal and/or control line64 g to control 63 and in this way can communicate to control 63 theposition in which valve body 12 or marking 45 is located.

Marking element 45 can be disposed on annular body 59, as is indicatedin FIG. 18 . Alternatively, marking element 45 can also be disposeddirectly on valve body 12.

In an alternative example of embodiment of the invention that isrepresented in FIGS. 19 and 20 , element 45 for the position marking isconstituted by a magnetic, in particular circular disc-shaped element.This is represented in FIG. 20 in a magnified detail view.

Two differently magnetized regions 45 a and 45 b can be seen, so thatelement 45 is constituted overall as a dipole magnet.

In the example of embodiment of FIG. 19 , circular disk 45 is disposedconcentric with central axis M of the apparatus.

Apparatus 69 for the position detection is also disposed in alignmentwith central axis M. The apparatus is connected to control 63 via acorresponding signal and/or control line 64 g. In this example ofembodiment, apparatus 69 for the position detection is constituted as amagnetic field sensor and is disposed fixedly on housing 24.

Control 63 preferably constantly detects the position of marking element45.

The examples of embodiment represented in the drawings make provisionsuch that valve body 12 can be displaced relative to fixedly held inletport disk 11.

In examples of embodiment of the invention not represented, valve body12 can also be fixedly held and inlet port disk 11 can be displacedrelative to valve body 12.

The two cross-sectional representations of FIG. 11 and FIG. 13 show thesame rotational position of valve body 12 relative to a disk 11.According to FIG. 11 , passage 42 is in an aligned arrangement withrespect to a groove-pocket 38 of flushing medium groove 36, i.e. in theflushing position. In this position of valve body 12, pump 20 can conveyflushing medium through passage 42.

In the rotational position according to FIG. 13 (this is the samerotational position as in FIG. 12 ), it can clearly be seen that inletport side 39 of valve body 12 closes in a sealing manner correspondinginlet ports 34 a, 34 b, 34 c, 34 d, 34 e, 34 f lying opposite.

FIG. 14 clearly shows that a connecting piece 33 a, 33 b, 33 c, 33 d, 33e, 33 f can be inserted into respective inlet port 27 a, 27 b, 27 c, 27d, 27 e, 27 f. Hoses, in particular, can thus be connected in astraightforward manner.

A pipe disconnecting device, a so-called pipe disconnector 46, is alsodescribed with the aid of the example of embodiment of FIG. 17 . Relatedto the example of embodiment of FIG. 16 , pipe disconnector 46 isassigned to a flushing device 47 and is disposed upstream of flushingmedium inlet port 28.

Pipe disconnecting device 46 and flushing device 47 comprise a container15 for flushing medium 48. Flushing medium 48 is water in the presentcase.

In order to prevent chemical impurities or germs from entering intowater main 49, a valve 51 that can be automatically opened and closed isprovided in the region of an outlet port 50 of the water main. A control52 is connected via a control line 53 to valve 51.

A lower level sensor 54 and an upper level sensor 55 are assigned toflushing medium container 15. Both sensors 54, 55 are also connected vialines 56, 57 to control 52.

As soon as level sensor 54 ascertains that a certain level is fallenbelow, because the remaining flushing medium volume has diminished dueto the removal of flushing medium 48 from container 15, a signal isrelayed via control line 56 to control 52. A processor 58 assigned forexample to control 52 then sends a signal to valve 51 via control line53 to initiate a valve opening. Water can then pass out of water main 49into container 15, wherein it covers a section WS in freefall. Container15 is filled until such time as an upper level is reached that isdetected by upper level sensor 55. When the reaching of the upper levelis detected, control 52 can be informed via control line 57, the controlthen activating valve 51 via control line 53 in order to initiate aclosing procedure. After completion of the closing procedure, water main49 is again hermetically sealed.

The advantage of such a pipe disconnecting device 46 lies in the factthat water main 49 is protected against backflows, against contaminationdue to germs or chemicals. The water can pass through a predefined dropsection in freefall. Backflows are therefore eliminated.

In particular, this advantageously enables, with a straightforwarddesign, a connection of inventive apparatus 10 to water main 49 with theaid of a pipe disconnecting device 46.

The geometrical configuration of containers 13 for media 17 and ofcontainer 15 for flushing medium 48 and the corresponding connection oflines 14 and 16 are only indicated and described diagrammatically. Thecorresponding connecting lines are preferably connected to containers 13via so-called suction lances, in order to remove corresponding media 17,i.e. the flushing medium, and to enable residual emptying.

The examples of embodiment of the apparatus according to the inventionhave been described on the basis of an arrangement that comprises twoelements displaceable relative to one another, i.e. an inlet port disk11 held fixedly relative to the housing and a valve body 12 displaceablerelative thereto. In other examples of embodiment, which are notrepresented in the figures, three or more elements, in particulardisc-shaped elements, could be provided in a stack arrangement.

Instead of a rotational displacement of a valve body, a lineardisplacement of valve body 12 also comes into consideration.

The example of embodiment has been described on the basis of two disksthat are made of a ceramic material. Other materials, for exampleplastic, metal, or materials provided with special surfaces or treatedin a special way can also be included.

The embodiments of the invention represented in the drawings eachrepresent a single apparatus, with which a plurality of inlet ports canbe brought into a communicative connection with the outlet port,optionally in a switchable manner. The invention also includes aplurality of such apparatuses 10 being connected to one another inseries or in parallel, in order—depending on the intended purpose andrequirement—to increase the number of fluids to be mixed or to be fed.

Insofar as the apparatus according to the invention employs athrough-flow measuring apparatus, which is preferably provideddownstream of the outlet port, it is particularly advantageous if only asingle through-flow measuring apparatus is provided.

The described apparatus is preferably used in combination with a userconstituted as washing machine 18. The user can however also be amedical apparatus, in which different chemicals are combined for themixing of a medicine, or it can be used in another way for the treatmentof illnesses. However, users can alternatively also be suitablyconstituted in other areas of cleaning technology, process technology,medicine, agriculture, chemistry, food technology, and can for examplecomprise a suitable collection container or mixing container.

The apparatus according to the invention can also be used for theanalysis of blood or urine samples. For example, the user can comprise avessel that is a component part of an analysis apparatus. For example,reactions of the substance to be analyzed with the introduced differentmedia, e.g. different saline solutions or saline solutions withdifferent concentrations, can take place in the vessel.

The use of an apparatus according to the prior art is for example alsoparticularly advantageous for this if, for example, different materialcontainers 13 are charged with different saline solutions, and the usercomprises the sample vessel.

The method according to the invention makes it possible, after a step ofintroducing a fluid into the passage, to flush the passage with aflushing medium as a result of a displacement of the latter. Each timeafter a first material has been carried out of the first inlet port intothe passage, a flushing medium 48 is preferably introduced into passage42 after displacement of valve body 12.

Water can be used as a flushing medium that in particular enables anadvantageous connection with water main 24.

In other examples of embodiment, however, provision can also be made touse media other than water as a flushing medium.

In an embodiment of the invention, non-return valves are providedupstream of inlet ports 27. The non-return valves prevent flushingmedium 48 or fluids 17 other than those intended from passingundesirably into corresponding containers 13 or into correspondingsupply lines 14, 16.

A housing arrangement 24 is advantageously provided, which engagestank-shaped around the two ceramic parts, in particular inlet port disk11 and valve body 12. The geometrical arrangement is preferably made insuch a way that rotational axis M is orientated vertically and valvebody 12 is disposed above inlet port disk 11.

Inlet port disk 11 and valve body 12 are also advantageously acted uponrelative to one another in the axial direction by a spring force. Ballcompression spring elements can be provided for this purpose. In thisconnection, FIG. 18 indicates that sleeves 70 can be disposed at theupper wall of housing 24, in which sleeves balls 71 are guided, theballs being acted upon by springs 72 in the extending sense. Springs 72are also disposed inside respective sleeve 70.

As a result of the spring force, balls 71 exert a force on annular body59 and thus at the same time on valve body 12, the force serving to loadinlet port side 39 of valve body 12 toward outlet port side 26 of inletport disk 11. The desired tightness between the two surfaces 26, 39lying against one another can thus be guaranteed.

The position of passage 42 or valve body 12 can be detected constantlyby unit 69 or control 63, or can be so only at specific times, forexample before and after each activation by drive 62.

Valve body 12 can comprise an over-rotation lock (not represented). Thismeans that valve body 12 can always be rotated only over a maximumangular range of for example 355° and then a safety lock prevents arotation from taking place beyond the predetermined maximum angle. It isthus possible to ensure, for example, that lines or hoses do not twistbeyond a predetermined extent.

In order to bring passage 42 into a communicative communication with aspecific inlet port, it may be necessary for a complete reverse rotationof valve body 12 to take place.

The apparatus can for example also be constituted as a retrofittingapparatus in order to be connected to existing washing machines. It canadvantageously be connected via an interface, for example via a control,e.g. via a relay, to a program selection switch of an industrial washingmachine. For this purpose, provision can for example also be made for anadaptation and conversion of the control signals received from a relayof a conventional industrial washing machine or washing machine into newcontrol signals.

The example of embodiment of FIG. 21 shows an apparatus according to theprior art, wherein the plurality of inlet ports have been converted intoa plurality of outlet ports and the single outlet port has beenconverted into the single inlet port. A geometrically invertedarrangement is thus made here, wherein the outlet port is disposedupstream of the inlet ports, related to flow direction P.

With the inventive apparatus according to the prior art used in thisway, single inlet port 27 x is connected to a flushing medium container15 or a material container.

The numerous outlet ports 19 x 1, 19 x 2, 19 x 3, 19 x 4, 19 x 5 areconnected via corresponding lines 14 a, 14 b, 14 c, 14 d, 14 e, 14 f toa plurality of users 18 a, 18 b, 18 c, 18 d, 18 e, 18 f.

The activation of the valve body not represented in the example ofembodiment of FIG. 21 can take place in a similar way to that explainedwith respect to the example of embodiment of FIG. 16 . This takes placesolely with the difference that, instead of a plurality of materialcontainers 13 and flushing medium container 15, only a single outputcontainer 15 (material container or flushing medium container) is nowused and, instead of a single user 18 in the example of embodiment ofFIG. 16 , a plurality of users 18 a, 18 b, 18 c, 18 d, 18 e, 18 f is nowused in the example of embodiment of FIG. 21 .

FIG. 21 thus shows an example of embodiment of an apparatus according tothe invention.

Finally, it is noted with regard to the example of embodiment of FIG. 22that here two apparatuses 10 a and 10 b are disposed in series facingone another geometrically inverted.

Along dashed parting plane T, the example of embodiment of FIG. 16 inthe upper part of FIG. 22 and the example of embodiment of FIG. 21 inthe lower part of FIG. 22 have as it were been combined, in such a waythat the user of apparatus 10 a is now provided by apparatus 10 b, or inother words, output material container 15 of apparatus 10 b is nowprovided by apparatus 10 a.

It is clear to the person skilled in the art that such a series invertedarrangement of two apparatuses according to the invention leads to amarked increase in the number of possible switchable, communicativeconnection paths. In specific cases of application, a greater number ofvariants of switching paths can thus be achieved.

With regard to the relative spatial arrangement of apparatus 10 inrelation to material containers. 13, and to flushing medium container15, provision can be made according to a first variant such thatapparatus 10, related to the orientation prescribed by gravitationalforce, is located above material supply containers 13, and the flushingmedium container. The effect of this, even if slight tightness problemsare present in the apparatus, is that the media in principle run backinto the material containers. With an alternative embodiment of theinvention, material supply containers 13, related to the directionprescribed by gravitational force, can be disposed above the apparatusin order, for example, to prevent media from running back into thematerial supply containers when there are tightness problems in theapparatus.

A further alternative example of embodiment of an inlet port disk 11 foruse in an apparatus according to the invention is described with the aidof FIGS. 23 and 24 .

As in the case of inlet port disk 11 according to FIGS. 5 to 10 , theinlet port side of inlet port disk 11 is denoted by 25 and its outletport side by 26. Located on inlet port side 25 is an inlet port 28 for aflushing medium, as well as seven further inlet ports 27 a, 27 b, 27 c,27 d, 27 e, 27 f, 27 g for materials or media. Inlet port disk 11 ispenetrated by a central through-hole 29.

On its outlet port side 26, inlet port disk 11 comprises a number ofinlet ports 34 a, 34 b, 34 c, 34 d, 34 e, 34 f, 34 g corresponding tothe number of inlet ports 27 a, 27 b, 27 c, 27 d, 27 e, 27 f, 27 g.Furthermore, an opening 35 is provided (FIG. 24 ) that communicates withflushing medium inlet port 28. Opening 35 emerges into a groovearrangement 36. Groove arrangement 36 comprises groove-pocket regions 38a, 38 b, 38 c, 38 d, 38 e, 38 f, 38 g, which each extend between twoinlet ports (e.g. 34 a, 34 b). Groove 36 is therefore also constitutedin this example of embodiment in such a way that a pocket region 38 a offlushing medium groove 36 is located between two respective inlet ports(e.g. 34 a, 34 b).

Overall, groove 36 for the flushing medium is constituted according toFIG. 24 such that it completely surrounds a respective material inletport (e.g. 34 a). This leads to a particularly optimized flushingcapability of the decisive surfaces coming into contact with oneanother, and to a particularly reliable separation of different mediafrom one another.

In the example of embodiment according to FIG. 24 , flushing mediumgroove 36 is bordered by a bottom surface 74, and by an inner lateralsurface 75 and by an outer lateral surface 76. Inner lateral surface 75is a component part of an outer annular collar 77 and outer lateralsurface 76 is a component part of an inner annular collar 78.

Furthermore, flushing medium groove 36 is bordered by outer lateralsurfaces 79 a, 79 b, 79 c, 79 d, 79 e, 79 f, 79 g etc. that are disposedrespectively on an annular collar 80 a, 80 b, 80 c, 80 d, 80 e, 80 f, 80g, wherein each annular collar 80 a, 80 b, 80 c, 80 d, 80 e, 80 f, 80 gsurrounds a material inlet port 34 a, 34 b, 34 c, 34 d, 34 e, 34 f, 34g.

In the assembled state, inlet port side 39 of valve body 12 of FIGS. 25and 26 functions as a sealing surface with respect to flushing mediumgroove 36 and with respect to material inlet ports 34 a, 34 b, 34 c, 34d, 34 e, 34 f, 34 g.

In the assembled state of apparatus 10, this sealing surface 39 makescontact with an annular end face 81 of inner annular collar 78, anannular end face 82 of outer annular collar 77, and individual annularend faces 83 a, 83 b, 83 c, 83 d, 83 e, 83 f, 83 g of individual annularcollars 80 a, 80 b, 80 c, 80 d, 80 e, 80 f, 80 g that extend aroundinlet port 34 a, 34 b, 34 c, 34 d, 34 e, 34 f, 34 g.

As a result of this geometrical embodiment of a flushing medium groove36 constituted over a large area, it is possible to keep the total areaof the decisive, effective sealing surfaces small. Optimum forces forthe rotational displacement of the valve body as well as optimizedsealing can thus be achieved.

With regard to the example of embodiment of valve body 12 represented inFIGS. 25 and 26 , which can be used in cooperation with an inlet portdisk 11 according to FIGS. 23 and 24 , it should be noted that thelatter essentially corresponds to the valve body of FIGS. 1 to 4 . Onlythree additional blind holes 84 a, 84 b, 84 c are represented here onoutlet port side 40 of the valve body, the blind holes being able toensure better positioning and centering of built-on parts or, inparticular, rotary contact closure of valve body 12 with toothed wheel59 represented in the example of embodiment of FIG. 27 .

According to FIGS. 27 and 28 , a further distinctive so feature is to beexplained in a further example of embodiment of apparatus 10 accordingto the invention.

As described above, both valve body 12 according to FIG. 25 and inletport disk 23 comprise a central through-hole 29.

In assembled apparatus 10 according to FIGS. 27 and 28 , a centralconnecting piece or bolt 85 engages through this through-hole 29.Connecting piece 85 enables central, axial clamping of the two elements11 and 12 directly against one another, wherein the previously discusseddecisive sealing surfaces, i.e. inner side 39 of valve body 12 andannular end faces 81, 82, 83 a, 83 b, 83 c, 83 d, 83 e, 83 f, 83 g areclamped directly on one another. Connecting piece 85 can for example beconstituted as a screw and can be provided with a hexagonal screw head86 a and with an external thread at its opposite end, on which a screwnut 86 b sits.

Screw head 86 a can for example be sunk into a corresponding form-fitopening of toothed wheel 29, which both guarantees a rotary contactclosure with toothed wheel 59, and also provides axial lock with respectthereto. The corresponding opening in toothed wheel 59 can beconstituted for example as a blind hole that enables insertion of screwhead 86 a only to an extend such that the outer side of screw head 86 ais disposed flush with the toothed wheel surface, as can be seen in FIG.27 .

The other end of connecting piece 85 can be provided with a screw 86 baccording to FIG. 28 , so that axial clamping of inlet port disk 11 withvalve body 12 is enabled by rotation of screw 86 b with fixedly heldtoothed wheel 59 and fixedly held inlet port disk 11 or with fixedlyheld apparatus 10 overall. The axial force and therefore the contactforce can be adjusted very precisely by using a torque spanner.

The direct axial clamping of the two elements 11, 12 against oneanother, the elements comprising respective sealing surfaces 39 andrespectively 81, 82, 83, enables an optimized distribution andevening-out of the contact forces. Risks of asymmetries of the contactforce with respect to the rotational axis of valve body 12 are thusminimized.

Moreover, interfering influences of additional parts, such as forexample housing parts, on the exactly predetermined contact force can beavoided.

According to the example of embodiment of FIGS. 29 and 30 , in a furthervariant of an apparatus 10 according to the invention, inlet port disk11 is constituted in such a way that inlet ports 27 a, 27 b, 27 c, 27 d,27 e, 27 f, 27 g and flushing medium inlet port 28 lie on differentradii. According to FIG. 30 , inlet ports 27 a, 27 c, 27 e and 27 g aredisposed of a first larger radius around the central axis, and inletports 27 b, 27 d, 27 f and flushing medium inlet port 28 are disposed ona second, smaller radius. A modified routing of the supply lines to thecorresponding connecting pieces can thus be achieved, which for exampleenables an arrangement that requires only a small installation space.

Outlet port side 26 of inlet port disk 11 is represented in FIG. 29 .Material inlet ports 34 b, 34 d and 34 f, assigned inlet ports 27 b, 27d, 27 f whereof lie on the smaller, inner radius, are constituted hereelongated in the radial direction, in order to enable a communicativeconnection with passage 42—provided there is a corresponding rotationalposition of valve body 12. Assigned annular collars 80 b, 80 d and 80 fthat surround inlet ports 34 b, 34 d, 34 f, are accordingly alsoconstituted elongated.

A further possible valve body 12 is described below with the aid of theexample of embodiment of FIGS. 31 and 32 and a further example ofembodiment of an inlet port disk 11 is described below with the aid ofFIGS. 33 and 34 . Valve body 12 and inlet port disk 11 according toFIGS. 31 to 34 can also be used, instead of previously described inletport disk 11 and valve body 12, in the other examples of embodiment ofthe invention.

Inlet port disk 11 according to FIGS. 33 and 34 and valve body 12according to FIGS. 31 and 32 have in common the fact that both disks 11,12 are provided with a greatly reduced flange wall thickness WST thatleads to a considerable saving on material. As a component part of disk12, four connecting pieces 87 a, 87 b, 87 c, 87 d extend from outletport side 40 of valve body 12. The latter are integrally formed, in afirmly bonded manner and of a uniform material, at rear side 40 of valvebody 12. Connecting piece 87 d provides outlet port 19, andcomprises—comparable to the arrangement of valve body 12 according toFIG. 26 —an inlet port for the connection of a hose line, in particularfor the insertion of a hose connecting piece of a hose line.

Connecting pieces 87 a, 87 b and 87 c provide blind holes 84 a, 84 b, 84c that—as in the case of the example of embodiment of FIG. 26 —can servefor the positioning or centering of toothed wheel 59.

In the case of the example of embodiment of inlet port disk 11 accordingto FIGS. 33 and 34 , corresponding connecting pieces 88 a, 88 b, 88 c,88 d, 88 e, 88 f, 88 g, 88 h extend away from inlet port side 25 ofinlet port disk 11. The corresponding connecting pieces provide inletports 27 a, 27 b, 27 c, 27 d, 27 e, 27 f, 27 g. Connecting piece 88 hprovides flushing medium inlet port 28.

Total wall thickness W of inlet port disk 11 (FIG. 33 ) can correspondto wall thickness W of an inlet port disk according to the previousexamples of embodiment, for example according to FIG. 5 . Disk 11according to FIG. 33 thus has a wall thickness W that is made up of thesum of flange wall thickness WST of the circular region and height HE ofa connecting piece 88.

As a result of the fact that individual inlet ports 27 a, 27 b, 27 c, 27d, 27 e, 27 f, 27 g, flushing medium inlet port 28 and outlet port 19are provided by a respective connecting piece, a considerable saving onmaterial is on the one hand enabled. On the other hand, severaldesign-related and production-related advantages thus arise, inparticular the possibility of being able to make use of differentproduction processes for the two disks 11 and 12.

According to an advantageous embodiment of the invention, individualconnecting pieces 87 d and 88 a, 88 b, 88 c, 88 d, 88 e, 88 f, 88 g, 88h can also be constituted such that they enable a hose line to engagedirectly. For this purpose, the free rims of connecting pieces 88 a, 88b, 88 c, 88 d, 88 e, 88 f, 88 g, 88 h and also 87 d can for example beprovided with conical run-on bevels.

Individual connecting pieces 88 can thus be constituted in this way attheir free end region, as for example the hose connecting piece denotedby 32 f in FIG. 35 is constituted at its free end.

Alternatively, provision can also be made, as is represented in FIGS. 31to 34 , such that separate hose connecting pieces affixed to the hoselines, as represented for example in FIG. 11 and denoted there by 32,are inserted and/or pressed into respective opening 27 a, 27 b, 27 c, 27d, 27 e, 27 f, 27 g and 28 of connecting piece 88 a, 88 b, 88 c, 88 d,88 e, 88 f, 88 g, 88 h.

A further example of embodiment of an apparatus 10 according to theinvention is described below with the aid of FIGS. 35 and 36 . Here,once again, a concentric stack arrangement of an inlet port disk 11, avalve body 12 and a toothed wheel 59 is made. Passage 42 disposed invalve body 12 emerges into an outlet port 19 of valve body 12. An inletport 89 of a radial passage 90 is disposed lying opposite this outletport 19, the radial passage being located inside toothed wheel 59. Thetoothed wheel element, which can also be designated a cover element,provides for a return of the medium through a central return passage 91,the medium running axially inside a hollow mandrel. This return passageemerges in the region of inlet port disk 11, at its inlet port side 25,into an outlet port connecting piece 92. The hollow mandrel isconstituted in one piece with toothed wheel 59.

In this embodiment of the invention, all the connections can be providedat inlet port side 25 of inlet port disk 11.

The toothed wheel denoted by 59, which can also be designated as a coverelement or return element, thus also serves to connect outlet port 19disposed on valve body 12, with the aid of passages 90, 91, to a mouthopening 92 at the inlet port side 25 of inlet port disk 11, in orderthere to enable a simplified connection of the hose lines and in orderto accommodate apparatus 10 in the case of restricted installationspace.

FIG. 35 shows an example of embodiment, wherein passage 42 isconstituted linear. The passage disposed in toothed wheel element 59 andconstituted by radial passage 90 and return passage 91, however,comprises corners. A passage structure comprising corners and thereforedead space regions is however only suitable for applications in whichthe media to be conveyed do not collect in corner regions on account oftheir properties, or in which mixing of the media is not a disadvantage.Various essential oils that are fed as media to the steam flow of asauna are an example of such a case of application.

The example of embodiment of FIG. 35 shows a toothed wheel 59. In otherexamples of embodiment, which are not represented, element 59 is alsoconstituted as a drive element for the valve body, i.e. as a rotaryentrainment element for the valve body, and can be driven in a mannerother than with the aid of an outer toothed wheel rim.

In further examples of embodiment not represented, this drive element 59is provided with a central mandrel, similar to′ that represented in FIG.35 that is disposed in one piece with the drive element, but without areturn passage 91 being disposed therein. In these cases, the mandrelserves to engage through central holes 29 in valve body 12 and inletport disk 19, and to enable axial clamping of the two disks 11, 12against one another, and against a stop face on the drive element. Asshown by the example of embodiment of FIG. 35 , the free end of themandrel can thus be provided with an external thread, on which a screwnut 86 a is disposed, which clamps inlet port disk 11 axially againstvalve body 12.

We claim:
 1. A system comprising: a valve having a plurality of materialinlet ports, a flushing inlet port, and an outlet port; respectivesupplies of at last two different liquid materials, the supplies eachbeing connected to a respective one of the material inlet ports of thevalve; a supply of flushing medium connected to the flushing inlet port;an inlet port disk in the valve having a plurality of disk inlet portsand a flushing disk inlet port; a movable valve body in the valve,having a passage, and shiftable between a plurality of positions in eachof which a respective one of the inlet ports of the valve is connectedto the outlet port via the passage, the inlet port disk and the movablevalve body interfacing without interposition of a seal; and controlmeans for moving the valve body between the positions such that, aftereach time the valve body is in a position connecting one of the materialinlet ports to the outlet port and material has passed through thepassage, the valve body is moved into a position connecting the passagewith the flushing inlet port for flushing out the passage.
 2. The systemof claim 1, further comprising a flushing device for flushing thepassage, the flushing device being connected to a water mains networkwith the interposition of a pipe disconnecting device.
 3. The system ofclaim 1, further comprising: a device for through-flow measurementdownstream of the outlet.